PROPERTY AND EQUIPMENT (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Property and equipment
Property and equipment, gross	$ 1,558	$ 1,453
Less: accumulated depreciation	(793)	(770)
Total property and equipment, net	765	683
Land and improvements
Property and equipment
Property and equipment, gross	75	77
Real estate held for development and sale
Property and equipment
Property and equipment, gross	26	35
Buildings and improvements
Property and equipment
Property and equipment, gross	$ 293	279
Buildings and improvements \| Minimum
Property and equipment
Estimated useful lives	10 years
Buildings and improvements \| Maximum
Property and equipment
Estimated useful lives	30 years
Operating equipment
Property and equipment
Property and equipment, gross	$ 781	744
Operating equipment \| Minimum
Property and equipment
Estimated useful lives	5 years
Operating equipment \| Maximum
Property and equipment
Estimated useful lives	10 years
Office furniture and equipment
Property and equipment
Property and equipment, gross	$ 114	107
Office furniture and equipment \| Minimum
Property and equipment
Estimated useful lives	5 years
Office furniture and equipment \| Maximum
Property and equipment
Estimated useful lives	10 years
Leasehold improvements
Property and equipment
Property and equipment, gross	$ 36	24
Leasehold improvements \| Minimum
Property and equipment
Estimated useful lives	10 years
Leasehold improvements \| Maximum
Property and equipment
Estimated useful lives	30 years
Automotive equipment
Property and equipment
Property and equipment, gross	$ 64	63
Automotive equipment \| Minimum
Property and equipment
Estimated useful lives	3 years
Automotive equipment \| Maximum
Property and equipment
Estimated useful lives	5 years
Finance lease assets
Property and equipment
Property and equipment, gross	$ 53	53
Construction in progress
Property and equipment
Property and equipment, gross	$ 116	$ 71

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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